42919829 has 2 divisors, whose sum is σ = 42919830. Its totient is φ = 42919828.

The previous prime is 42919823. The next prime is 42919843. The reversal of 42919829 is 92891924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41899729 + 1020100 = 6473^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 42919829 - 2⁴ = 42919813 is a prime.

It is a super-2 number, since 2×42919829² = 3684223442778482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42919829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42919823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21459914 + 21459915.

It is an arithmetic number, because the mean of its divisors is an integer number (21459915).

Almost surely, 2^42919829 is an apocalyptic number.

It is an amenable number.

42919829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42919829 is an equidigital number, since it uses as much as digits as its factorization.

42919829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 42919829 is about 6551.3226908770. The cubic root of 42919829 is about 350.1219411838.

The spelling of 42919829 in words is "forty-two million, nine hundred nineteen thousand, eight hundred twenty-nine".